Protunguwatum donnae is de type species for de Protunguwatum genus, an extinct earwy form of euderianmammaw. Though it is by no means de earwiest mammaw in de fossiw record, a 2013 study considers P. donnae to be de owdest undisputed pwacentaw mammaw fossiw,[1][2] dough more recent examinations concwude dat it was a more basaw euderian and dat no pwacentaw predates de Paweocene.[3]